Rotary plow



c. L. LILLE'BERG..

ROTARY PLOW. APPLICATION m51) luNEzs. 19u.

Patented May 9, 1922.

UNITED STATES PATENT OFFICE.

CHARLES L. LILLEBERG, OF CHICAGO, ILLINOIS.

ROTARY PLOW.

Specification of Letters Patent.

Patented 'May 9,1922.

Application filed June 28, 1917. Serial No; 177,479.

ful Improvement in Rotary Plows, of which the following is a full,clear,vconcise, and exact description.

My invention relates to rotary plows and has for its object animprovementl in the construction and arrangement of the cutting ele-Aments thereof.

The invention in all of its characteristics will be fully described byreference to the accompanying drawing showing the pre-V ferredembodiment thereof and in which Fig. 1 is a perspective viewillustrating certain characteristics of construction; Fig. 2 is a detailperspective view illustrating one of the plow shares; and Fig. 3 is aview illustrating a set of plow shares that desirably operate in thesame plane.

Like parts are indicated by similar characters of reference throughoutthe different gures.

The drum 74 is co-axialwith and is de'- sirably fixed upon the suitablydriven shaft 16. This drum or rotatable support carries a plurality ofsets of plow shares orknives 75.

The stems of the plow shares are assembled upon the radial supports 76by means of the bolts 77. The bases 78 of the radial supports 76 arequadrants that are in the nature of shoes which fit upon the drum 74 andare fastened thereto by means of bolts 79. The shares or knives 75 are,as shown, angularly formed, the angularly related portions of each knifebeing desirably at right angles with respect to each other to" present aright angle cutting edge 80. Each knife, as a whole, rotates in avertical plane (the plane of rotation of drum 74) and the four knives ofeach set operate in the same plane. The sets of knives are arranged inserial order transversely of vthe plow and along the drum 74. The swathcut by each set of knives is adjacent the swaths cut Aby the adjacentsets of knives. The outer angular ends of the knives, extendingtransversely of the plow, determine the width of the swaths. The innerradial cutting portions of the knives separate or cut apart the adjacentswaths. The adjacent sets of knives are in staggered relation so thatthe swaths out bythe adjacent and staggered-knivesv of adjacent sets arecommenced sequentially and finished sequentially. The four knives ofeach set together cut fourtaperng ribbons in each revolution of the drum74, one

ribbon 81 per knife, these ribbons lgenerally breaking as they form.`The top broad 'face of each of these 'ribbons is cut by one of thesefour knives and the bo-ttom broad face of this ribbon is cut by thesucceeding one of these four knives, the thickness of the ribbon vbeingdetermined by the advance which the plow has made between the cutting ofthese two broad faces of the ribbon. The angular portion of each knifeterminates at the planel of operation of the radial portion of thepreceding knife so that each knife co-operates with each succeedingknife incutting a ribbon of soil, such succeeding knife completing thecutting of this ribbonv of soil. Reference may be had to the division ofthis application Ser. No.` 282,282, filed March 13, 1919. 2

While I haveherein shown and particu- .larly described the preferredembodiment of my invention, I do not wish to be limited to the precisedetails of construction shown as changes may readily be madewithoutdeparting from the spirit of my invention, but having thus described myinvention I claim as new and desire to secure by Letters Pat,- ent thefollowing:

A plow structure including a rotary plow element having a rotatablesupport; and a plurality of staggered sets lof plowl knives carried bysaid supportthe knives of each set operating substantially in the sameplane which is the plane of rotation of said support, saidknives'havingouter angular endsy sol extending transversely ofthe plow strucv ture,and substantially parallel with the axis of ysaid rotary plow element,the end portions of the knives of each yset terminating at the plane ofrotation of the inner portions of the knives of the adjacent set, thecutting edges of said knives extending along .their angular ends andbeing continued from their angular ends along their radial portions.

In witness whereof, I hereunto subscribe my name this twenty-third dayof June A. D., 1917.

CHARLES L. LILLEBERG.

